4-2 PLL ADJUSTMENT
ADJUSTMENT | ADJUSTMENT CONDITIONS |
| MEASUREMENT |
| VALUE | ADJUSTMENT | |||||
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UNIT |
| LOCATION | UNIT | ADJUST | |||||||
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TX VCO LOCK | 1 | • LCD display | : A01 LW TXREF 127 | TX |
| Connect | the | digital | 4.0 V | TVCO | C17 |
VOLTAGE |
| • Transmitting |
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| multi meter or oscillo- |
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| scope to | check | point |
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| CP4. |
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RX VCO LOCK | 1 | • LCD display | : A01 LW TXREF 127 | RX |
| Connect | the | digital | 4.0 V | RVCO | C17 |
VOLTAGE |
| • Receiving |
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| multi meter or oscillo- |
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| scope to | check | point |
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| CP3. |
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REFERENCE | 1 | • Wait for 5 minutes after power ON. | REAR |
| Loosely couple a fre- | 171.7250 MHz | FRONT | [PRT/BASE] | |||
FREQUENCY |
| • LCD display | : A01 LW TXREF | panel |
| quency counter to the | [GEN74] |
| /[MONI] | ||
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| Connect the RF power meter or 50 Ω |
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| [TX] antenna connec- | 173.7250 MHz |
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| dummy load to the [TX] antenna con- |
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| nector. |
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| • Transmitting |
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| 2 | • Push the [PROG] button | RX |
| Connect the frequency | 140.2750 MHz | FRONT | [PRT/BASE] | |||
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| • LCD display | : A01 LW RXREF |
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| counter to check point | [GEN74] |
| /[MONI] | ||
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| • Receiving |
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| CP2. |
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| 142.2750 MHz |
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| [Other] |
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•IC-FR3000 TOP VIEW
TX UNIT
RX UNIT
• TX UNIT TOP VIEW | • RX UNIT TOP VIEW |
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| CP2 | CP2 |
| Reference frequency |
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| check point | L10 |
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CP2
CP4 |
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CP4 |
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CP1 | CP18 | CP3 |
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LV |
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CP4 |
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TX VCO lock voltage |
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check point |
| CP3 |
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C17 (TVCO unit) |
| C17 (RVCO unit) | |
TX VCO lock voltage |
| RX VCO lock voltage | RX VCO lock voltage |
adjustment |
| chack point | adjustment |
4 - 5
